论文

苏北盐沼DMS、CS2和CH4排放通量沿高程梯度的变化

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  • 1. 徐州师范大学城市与环境学院, 江苏 徐州 221116;
    2. 中国科学院地理科学与资源 研究所, 北京 100101;
    3. 南京大学生命科学学院, 江苏 南京 210093
王进欣(1971- ),男,河北张家口人,副教授,主要从事湿地生态研究。E-mail:yujianw7125@163.com

收稿日期: 2008-10-07

  修回日期: 2009-01-10

  网络出版日期: 2009-07-20

基金资助

国家自然科学基金(90211008)、江苏省高校自然科学研究计划一般项目(06KJB170112)、林业科技支撑计划子专题(2006BAD03A1903)、徐州师范大学基金理科培育项目和博士回校科研启动基金、中国博士后科学基金项目资助。

Characteristics of DMS, CS2 and CH4 Fluxes along an Elevational Gradient of a Coastal Salt Marsh, East China

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  • 1. College of Urban and Environment, Xuzhou Normal University, Xuzhou, Jiangsu 221009;
    2. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101;
    3. Department of Biology, Nanjing University, Nanjing, Jiangsu 210093

Received date: 2008-10-07

  Revised date: 2009-01-10

  Online published: 2009-07-20

摘要

在中国东部海岸带盐沼沿环境梯度采用静态箱技术原位测定CH4、DMS和CS2气体的通量。结果表明,苏北海岸带盐沼整体上表现为CH4、DMS和CS2气体的源,其中,互花米草带(Spartina alterniflora)排放率最高。CH4、DMS和CS2排放率之间的正相关关系支持DMS是甲烷生产底物的推断。高等植物地上部分是CH4、DMS和CS2气体的重要源,但植物排放这些气体的机制还不清楚。盐沼CH4、DMS和CS2气体的净排放可能与盐沼丰富的有机质含量有关,有机质为土壤微生物提供充足的碳源和能量。

本文引用格式

王进欣, 孙书存, 王今殊, 仲崇庆, 邢伟 . 苏北盐沼DMS、CS2和CH4排放通量沿高程梯度的变化[J]. 地理科学, 2009 , 29(4) : 535 -539 . DOI: 10.13249/j.cnki.sgs.2009.04.535

Abstract

The fluxes of methane (CH4), dimethyl sulfide (DMS) and carbon disulfide (CS2)) were seasonally measured using static flux chambers over an annual cycle along an elevational gradient of a eastern Chinese coastal salt marsh. To estimate the contribution of higher plants to the fluxes, plant aboveground biomass was experimentally removed and the flux differences between the treatment and the intact were examined. The salt marsh generally functioned as a source for CH4, DMS and CS2, with the maximum occurring at the cordgrass (Spartina alterniflora) marsh. CH4 emission rates were positively correlated to those of DMS and CS2, indicating a possible coupling between sulphur and carbon cycles in the study marsh. Comparative analyses showed that higher plants were present as an important source of CH4, DMS and CS2. However, the mechanism underlying plant emissions is not clear. CH4, DMS and CS2 emission rates were positively correlated to soil organic matter content and total nitrogen content, suggesting that the observed overall net emissions of CH4, DMS and CS2 might result from the enriched soil organic matter, which feed soil microorganisms using organic matter as a source for both carbon and energy.

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